Reference for Chullin 205:18

ומר סבר

Raba said: It is a case where the person tore away a limb from the living animal and thereby rendered it trefah.<span class="x" onmousemove="('comment',' E.g., he cut off the leg of a living animal above the knee-joint, v. supra 76a, and he ate it.');">⁹</span>

Jastrow